Key result
Rubbing the test site before drawing blood reduces differences between fingertip and forearm glucose measurements.
Why the study?
Differences in glucose measurements between fingertip and forearm blood samples are influenced by circulatory physiology and site preparation, which had not been fully addressed.
Comparison
Finger blood glucose measurement vs forearm blood glucose measurement
Design
Editorial letter discussing measurement methodology and physiology
Authors
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Supports rubbing the test site to minimize fingertip-forearm glucose discrepancies; hypothesis-generating and requires prospective validation before practice change.
Rubbing the test site before drawing blood increases perfusion and significantly reduces the difference between fingertip and forearm blood glucose measurements.
Geoff McGarraugh (2001) conducted a letter in Blood glucose monitoring. Rubbing the test site before drawing blood vs. Not rubbing the test site was evaluated on Difference in fingertip and forearm blood glucose measurements. Rubbing the test site before drawing blood significantly reduces the difference between fingertip and forearm blood glucose measurements.
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